Example of how to send a notification using the Web Notification API

webnotification.js

function showNotification(title, body) {
    var notification = new Notification(title, { body });
    notification.onclick = e => {
        alert("Clicked!");
    };
}

Notification.requestPermission(permission => {
    console.log(permission);
    if(permission==="granted") {
        var t = "Hello there!";
        var m = "Message using the Web Notification API."; 
        showNotification(t,m);
    }
});